<template>
	<view v-if="goods_info.goods_name" class="goods_detail_container">
		<!-- 轮播区域 -->
		<swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
			<swiper-item v-for="(item,index) in  goods_info.pics" :key="index">
				<image :src="item.pics_big" @click="preview(index)"></image>
			</swiper-item>
		</swiper>
		<!-- 轮播区域结束 -->

		<!-- 商品信息区域 -->
		<view class="goods_info_box">
			<!-- 商品价格 -->
			<view class="price">
				¥ {{goods_info.goods_price}}
			</view>
			<!-- 商品信息主体区域 -->
			<view class="goods_info_body">
				<!-- 商品名字 -->
				<view class="goods_name">
					{{goods_info.goods_name}}
				</view>
				<!-- 收藏 -->
				<view class="favi">
					<uni-icons type="star" size="18" color="gray"> </uni-icons>
					<text>收藏</text>
				</view>
			</view>
			<!-- 运费 -->
			<view class="yf">
				运费：免运费
			</view>
		</view>

		<view class="goods_info_text">
			<view class="goods_info_title">图文详情</view>
			<view class="goods_info_content">
				<rich-text :nodes="goods_info.goods_introduce"></rich-text>
			</view>
		</view>

		<!-- 商品购买导航 -->
		<view class="goods_nav">
			<uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup" @click="onClick"
				@buttonClick="buttonClick" />

		</view>

	</view>
</template>

<script>
	import {
		mapState,
		mapMutations,
		mapGetters
	} from 'vuex'

	export default {
		computed: {
			//把 m_cart的购物车数组映射过来 
			...mapState('m_cart', ['cart']),
			...mapGetters('m_cart', ['total']),
		},
		watch: {
			// total(newVal) {
			// 	//2，通过数组的 find()方法，找到购物车按钮的配置对象
			// 	const findResult = this.options.find((x) => x.text === '购物车')
			// 	//3,动态为购物车按钮的 info 属性赋值

			// 	console.log("watch",findResult)
			// 	if (findResult) {
			// 		findResult.info = newVal;
			// 	}
			// }

			total: {
				handler(newVal) {
					//2，通过数组的 find()方法，找到购物车按钮的配置对象
					const findResult = this.options.find((x) => x.text === '购物车')
					//3,动态为购物车按钮的 info 属性赋值

					console.log("watch", findResult)
					if (findResult) {
						findResult.info = newVal;
					}
				},
				immediate: true
			}
		},
		data() {
			return {
				goods_info: {},
				// 左侧按钮组的配置对象
				options: [{
					icon: 'shop',
					text: '店铺'
				}, {
					icon: 'cart',
					text: '购物车',
					info: 0
				}],
				// 右侧按钮组的配置对象
				buttonGroup: [{
						text: '加入购物车',
						backgroundColor: '#ff0000',
						color: '#fff'
					},
					{
						text: '立即购买',
						backgroundColor: '#ffa200',
						color: '#fff'
					}
				],
			}
		},
		methods: {
			...mapMutations('m_cart', ['addToCart']),

			async getGoodsDetail(goods_id) {
				const {
					data: res
				} = await uni.$http.get('/api/public/v1/goods/detail', {
					goods_id
				});
				if (res.meta.status !== 200)
					return uni.$showMsg();

				//解决图片中间有空隙问题		 <img style="display:block;
				//解决webp不支持在ios设备上显示
				res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g,
					'<img style="display:block;" ').replace(/webp/g, 'jpg')
				this.goods_info = res.message;
			},
			preview(index) {
				uni.previewImage({
					// 预览时，默认显示图片的索引
					current: index,
					urls: this.goods_info.pics.map(x => x.pics_big)
				})
			},
			onClick(e) {

				if ('购物车' === e.content.text) {
					uni.switchTab({
						url: '../../pages/cart/cart'
					})
				}
			},
			buttonClick(e) {

				if ('加入购物车' === e.content.text) {
					//组织商品的信息对象
					// { goods_id, goods_name, goods_price, goods_count, goods_small_logo, goods_state }

					const goods = {
						goods_id: this.goods_info.goods_id,
						goods_name: this.goods_info.goods_name,
						goods_price: this.goods_info.goods_price,
						goods_count: 1,
						goods_small_logo: this.goods_info.goods_small_logo,
						goods_state: true
					}

					//调用 addToCart 方法
					this.addToCart(goods);

				}

			}

		},
		onLoad(option) {
			// 获取商品 Id
			const goods_id = option.goods_id;
			// 调用请求商品详情数据的方法

			this.getGoodsDetail(goods_id);
		}
	}
</script>

<style lang="scss">
	.goods_detail_container {
		margin-bottom: 50px;
	}

	swiper {
		height: 750rpx;

		image {
			width: 100%;
			height: 100%;
		}
	}

	.goods_info_box {
		padding: 10px;
		padding-right: 0;

		.price {
			color: #C00000;
			font-size: 18px;
			margin: 10px 0;
		}

		.goods_info_body {
			display: flex;
			justify-content: space-between;

			.goods_name {
				font-size: 13px;
				margin-right: 10px;
			}

			.favi {
				width: 120px;
				display: flex;
				font-size: 12px;
				flex-direction: column;
				align-items: center;
				justify-content: center;
				border-left: 1px solid #efefef;
				color: gray;
			}
		}

		.yf {
			font-size: 13px;
			margin: 10px 0;
		}
	}

	.goods_nav {
		position: fixed;
		bottom: 0;
		left: 0;
		width: 100%;
	}
</style>
